Home / 20,712.60-28,589.22-18,671.40

Finding the Fourth Proportional to 20,712.60, 28,589.22 and 18,671.40

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Solution

The fourth proportional to 20,712.60, 28,589.22 and 18,671.40 is: 25,771.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.60 : 28,589.22 = 18,671.40 : x
  2. Step 2: Convert to fraction form
    20,712.60/28,589.22 = 18,671.40/x
  3. Step 3: Cross multiply
    20,712.60x = 28,589.22 × 18,671.40
  4. Step 4: Simplify right side
    20,712.60x = 533,800,762.31
  5. Step 5: Solve for x
    x = 533,800,762.31/20,712.60
  6. Step 6: Final answer
    x = 25,771.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.